Having just tested the Olympus 14-42 f3.5-5.6 EZ I was expecting the same sort of performance from this lens. Lets just look at these two for a minute; both are 14-42mm, both are f3.5-5.6 and both have a power zoom (or electronic zoom). Lets see the specs for the lens:
Panasonic Lumix G Vario 14-42 f3.5-5.6 PZ Power O.I.S.
Size: 27mm x 61mm
Aperture: f3.5 - f22